An engine doesn't get 100 mpg, a vehicle does.
Attach it to a normal-sized vehicle and get 100 mpg under realistic driving conditions, and I'll be impressed. ('til then I'll be internet-snarky!)
Attach it to a normal-sized vehicle and get 100 mpg under realistic driving conditions, and I'll be impressed. ('til then I'll be internet-snarky!)
I'm skeptical, but I applaud him for making public a very specific and short-term goal that we can all watch: coast-to-coast USA on 40 gallons of fuel in a small SUV.
Without having a source, I suspect a caveat wherein he will plug in to fully recharge the electric battery every X hours, which would be far less impressive.
Now, if this is cross-country, on a single 40 gallon tank, without plugging in to recharge, in an SUV that is not gutted to reduce the vehicle's weight... that would be impressive.
FTA, FWIW: "McDowell is using a Stirling engine, coupled with thermopile technology to make it possible to drive a Hybrid electric car and never have to stop to charge it."
My intuition was that the Stirling engine would partially recharge the battery while it runs. If it can truly keep the battery fully charged, that is quite awesome. Time will tell. :)
Article says "The Stirling engine is capable of using roughly 50% of the energy it produces. An internal combustion engine, like the ones in our vehicles, uses about 14%." This isn't even wrong - the efficiency of both of these engines depends on a huge range of factors.